Basic Sound Parameters
17
1
3
2
4
OD/DS (OverDrive / DiStortion)
Select the PCM type for oscillator 1 and change the waveform to number
161
“
Clean
Gt Lo
”. You should be able to hear a half-muted electric guitar sound. Select
OD
/
DS
in
the
COSM1
/
COSM Type
page
. The sound is now completely overdriven. If you
prefer a little more movement within the sound, select the
Drive
tab, change the Drive
value to
64
, flip
Sustain
down to minimum, change
Decay
to about
35
and take
Env
Depth
up to
+63
. For a “rounder” guitar sound, select the drive type
DS
, touch the
Tone
tab and change the value of the Tone parameter to around
64
. Of course you can
apply an envelope to either or both of these parameters (Drive, Tone) and even make
them velocity sensitive...
3
1
W-SHAPE (Wave Shaper)
Barinet
This is an alternative method of adding high-frequency partials to a waveform, at the
same time attenuating some of the lower frequencies. Although grouped under the
“guitar modeling” algorithms, I find this one particularly suited to sustained sounds. For
instance, let’s turn a clarinet sound into an edgy baritone-sax: Start from
512:INIT
PATCH
, select the
PCM
type for oscillator 1 and change the waveform to number
113
“
Clarinet Vib
”. Go to
Common
/
Tune
and take the overall Patch Tune (Course) down
an octave (-12). Go to
COSM1
/
COSM Type
and select
W-SHAPE
. Change the
Shape Type
to number
4
. Touch the
Drive
tab and
reduce
the
Drive
value to
around
100
. Play low notes on your keyboard.
3
2
1
AMP (Amplifier Emulation)
Because it is polyphonic, “power chord” type interaction between notes is not possible
using
COSM
(the Effects section is much more suitable for that). However, this algorithm
can be very useful for adding very typical amplifier distortion when using
COSM2
for
Speaker Emulation
. Try it!
The COSM Sections
1
3
2
Although these two sections may appear to contain a bunch of add-on effects (like in the
V-Synth
’s own Effect section or a stand-alone
effects unit),
COSM
is fundamentally different. It is polyphonic i.e. the effects will be applied separately to each and every note you play!
Start again from scratch (
512:INIT PATCH
) and touch the
COSM1
pad. The available COSM algorithms can be divided into four basic
categories: Guitar Modeling (the top row), Filters (the middle row), Dynamic Processing and Special Effects (both in the bottom row).
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